Chief Rugby League Reporter

The NRL has confirmed Canterbury will again be under review for the club's handling of the concussion protocols in Friday night's loss to the Roosters.

Two incidents late in the first half of the ANZ Stadium clash could prove costly. The first involved fullback Sam Perrett, who seemingly refused the direction of a trainer to come from the field for assessment. The other featured captain Michael Ennis, who stayed down after appearing to suffer a knock to the head. Sceptical Roosters players told the hooker to get to his feet, believing he was staying down to milk a penalty.

Both players remained on the field in the heated clash, and Ennis even gave a short interview to a broadcaster as he came off for half-time. ''Both those cases will be looked at by the NRL to see if there was any breach of the concussion rules,'' an NRL spokesman said.

It's believed the issue of diving will also be discussed at Rugby League Central. In the past, players have stayed down to give the video referee time to find a potential illegality. But as Friday's incidents suggest, the ploy could backfire if clubs are stung for concussion breaches. Half the Dogs' $20,000 fine was suspended over a previous incident, but they may have to pay the full amount if there are more breaches.

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Canterbury are the only club to be fined for breaching the guidelines for their handling of a head knock to forward Josh Jackson. The Bulldogs escaped a further fine for not taking off James Graham, because the trainer didn't see the incident. That loophole has been closed and cannot be used in future defences.

The Wests Tigers have been issued a breach notice for failing to take Liam Fulton off the field. The joint-venture club has submitted a response but is yet to learn its fate.

The ARL Commission have shown they are taking the concussion issue seriously by engaging an independent doctor to sit on the sidelines during State of Origin matches to ensure concussed players are immediately replaced. Former North Sydney and Manly physician Ken Crichton will have access to a video monitor and will work with the team medicos to determine if players should be removed from the game.

■ Jacob Lillyman says Broncos, Titans and Cowboys players have an advantage in getting into the Queensland State of Origin side that he doesn't get at the Warriors.

The prop was unlucky to miss out on selection for Wednesday's Origin I at Suncorp Stadium as the Warriors again failed to get a player in the showpiece. Lillyman's last appearance for Queensland was in 2011.

Feleti Mateo turned down the chance to play for Tonga at last year's World Cup in the hope it would help him get selected for NSW, and Dane Nielsen fell out of contention for Queensland when he left the Storm.